Dormer PFX A921 1/2 AICrN Coated Cobalt Screw Machine Length Parabolic Flute Drill 130 Degree Notched Point 0633397

The Dormer A920 and A921 Series Screw Machine Length Drills Are a Heavy Duty Parabolic Flute Design To Allow Greater Drilling Depths In One Pass. The Notched Point Improves Chip Formation.  Both Are Premium Cobalt Base Material With The A920 Left Uncoated Bright Finish To Improve Chip Flow In Solft Or Non-Ferrous Materials and The A921 Combined With Aluminum Chromium Nitride (AICrN) Coating To Increase Lubricity And Wear Resistance For Longer Tool Life.